Twine



UNITED STATES PATENT OFFICE.

JOHN F. STEWARD, OF CHICAGO, ILLINOIS.

TWINE.

SPECIFICATION forming part of Letters Patent No. 501,970, dated July 25, 1893.

Application filed November 25, 1892. Serial No. 453,147. (No specimens.)

.To an whom it may concern:

Be it known that I, JOHN F. STEWARD, of Chicago, in the county of (look and State of Illinois, have invented a new Twine for Use in Grain-Binders and for Similar Purposes, of which the following is a specification.

The object of my invention is to produce a twine from paper, capable of being used for binding grain by automatic binders and it consists in a cord formed of twisted paper and coated upon its surface with a drylubricant.

The process of and mechanism for manufacturing my twine are shown and described in an application filed simultaneously herewith designated by the Serial No. 453,148.

I prepare the paper twineby drawing strips thereof through a former and coating it with a dry lubricant, whereby the twine is made capable of being drawn from the knotting devices and formed into a tight knot.

In the use of paper twine for grain binders difficulty has heretofore been encountered because of the roughness of the surface of the twine and because of the excessive friction of the said surfaces of the paper when moving in contact with each other while drawing the cords tightly in completing the knot. The friction in those cases has proven so great that the strands break before they would render through the encircling parts of the knot as the latter drew closer.

Paper twine has been used in binding grain,

lubricated by the use of oil, but oils are likely Y to soften the twine so much that the adhesion of thefibers becomes reduced. Another difficulty has been that the oil eventually becomes hard which prevents the twine from flattening in order to draw through the holder under stress of the knotting devices. Dry lubricants, preferably plumbago, applied to the surface do not penetrate the paper and by hardening cement the folds thereof together, but leave them so that the end of the cord is free to untwist and flatten as drawn therethrough.

By the term dry lubricants I mean such as, in their normal state, are sufficiently free from oils, fats, gums, resins, hydrogen, &o., to permit comminution or reduction to apulverized condition, and such as, when used and applied in a moistened condition, will give up their moisture by natural evaporation and return again to a dry condition.

My twine consists in one or more strips of paper formed into a tube collapsed by twisting, and upon its surface the coating described.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. As a new article of manufacture, a twine made of raw paper and having its surface coated with a dry lubricant, substantially as described.

2. As a new article of manufacture, a paper twine having its surface coated with plumbago, substantially as described.

3. As a new articleof manufacture, atwine made of strips of raw paper coiled into tubular form and twisted, and having adry lubricant applied to its surface, substantially as described.

JOHN F. STEWARD.

Witnesses:

ARTHUR JOHNSON, F. G. MIDDLEKAUFF. 

